plumbing compost toilet exhaust to gray water line with AAV

[Dearranged]

Hoping someone will lend some insight into my plumbing dilemma.

Avion plumbed the gray and black water tank vents on the opposite side of the bathroom. I am installing a composting toilet (natures head) that needs to be vented. I either take it out the side or there is the gray water drain with an AAV valve it will pass by, which I can install a T and plumb into that. Now this goes to the gray water tank, which is vented on the opposite side. I don't see any problem with this, it is just a long way around to the vent stack. Only problem would be if the gray tank was full and would no longer vent, and would indicate a drain of the gray water tank hopefully before that event occured.

So what do the minds say or have any insight, yay or nay?

[inthepines]

Originally Posted by Dearranged

Hoping someone will lend some insight into my plumbing dilemma.

Avion plumbed the gray and black water tank vents on the opposite side of the bathroom. I am installing a composting toilet (natures head) that needs to be vented. I either take it out the side or there is the gray water drain with an AAV valve it will pass by, which I can install a T and plumb into that. Now this goes to the gray water tank, which is vented on the opposite side. I don't see any problem with this, it is just a long way around to the vent stack. Only problem would be if the gray tank was full and would no longer vent, and would indicate a drain of the gray water tank hopefully before that event occured.

So what do the minds say or have any insight, yay or nay?

I don't see any issue with this. If for some reason your gray tank overfills, it's going to come up out of drains first. Same goes with the black tank.which you basically eliminated with your new toilet so that is irrelevant.
long story short, there should not even be anything close to contamination from overflowing tanks. and I don't see odors overwhelming the gray tank vent. I've seen some that actually wye together anyway.

[Dearranged]

Thanks for the feedback. My thoughts also. Checked with the plumber at the hardware store and he sounded pretty confident. I did get everything plumbed, gave it the overnight onion test, and it passed. The future has yet to tell.